Typographical casting machine



June1 0, 1930. R ROGERS 1,762,890

TYPOGRAPHICAL CASTING MACHINE F Filed Feb. 4. 1929 I 4 Sheets-Sheet- 1'%B i VENTOR ATTO EYI June 10, 1930. J RbGERS 1,762,890

TYPOGRAPHICAL CASTING momma Filed Feb. '4, 1929 4 Sheets-Sheet 2 Jun 10,1930.

' J. R; ROGERS TYPOGRAPHICAL Filed Fe CASTING MACHINE b. 4,v 1929 4Sheets-Sheet 5 W MWATTORNEYS June 10, 1930- J. R. ROGERS Q TYPOGRAPHICALCASTING MACHINE Filed Feb. 4, 1929 4 Sheets-She et 4 Patented June 10,1930 dorm. a. means, on BROOKLYN;

. TYPE coMrimY, ncoRroRAr oivforf'NEw onK-f rrrroeanrnioar casrrive MCHIN Application filed iebruary '4, 1929. .Seria1.No.337,207. a

This invention relates totyipographical" casting machines, suchlaslinotype machines of the general organization represented in- S. LettersPatent to O. Mergenthaler,

436,532, wherein a melting pot is arranged to deliver molten metal intoa slottedmold and Lip-against a composed line oi'inatrices to typebaror-slug bearingx'on ts produce .a

to the 1nj-.

edge type characters corresponding tagliocharactersof the matrices. Inthese machines, the molten metalis introduced into the mold by means ofa spring-actuated pump piston or 1 plunger arranged Within the pot andcontrolled in its action by a rotary cam,

which makes one complete revolution for each "cycle oi operation of themachine. The, cam is usuallymade of cast iron and is concentric thruoutexcept at. one point in-its circumferi so iisconnectedidi'rectly ence,depression, which at the proper time permits the plunger to descendunder the influence otfitsractuatingspring to fillthezmold with moltenmetal :Eor the cast; iNormally,,however, the plunger is s'ustainedby thecam in raised or, inactive-position against 'theftension of its:actuating spring thru: the medium of a so-called fpump leverjZTone'arm'of which is providedwi'th anlanti-iric'tion roller bearing against thecam, and the other arm of which the parts are thus arranged, the rolleris causedto ride idly upon the camvunder thethe pump actuating constant?pressure of spring for approximately :five-sixths of? each cycle ofoperation ofv the machinej-(the in-, active period of the-plunger)andjthereb-y subjects the cam toexicessive wear; Thus, in jlinotypemachines as ordinarily constructed, the axisyof the anti-friction rolleris seldom absolutely true or in parallelism with the cam shaft, and eventhough it should happen to be accurately positioned at the time of assemblying, normal shrinkage and expansion of the metal in the supportingbracket and adj acent parts, as well as the strains set up therein: .bythe pump. spring, .frequently;pre'-- event the proper rollingcontactbetween the"- thru which molten metal :is forced upwardly by areciprocating during the casting fille i Q C i -J A a r su h ii u edgesof the cast iron cam chip? and break 0E, the tracking surface of the camoften becomes deeply scored, a noisy, and otherwise objectionable;

where, it isformed :with ,Zrecess or tothe' plunger rod. As i V castingme The present invention 1s intended toob-viate these and otherdifficulties by relieving h 'o h -Pre u e of h rum -a atin 1 springwhile the -plunger is inactive. T Q this NEW Y RK, Assamhammer.we

ndv the operation is end, it is proposed to lockrsaid springnon mallyout of momentarily, so that it may function-as heretote-re, .at the timeof casting ferred embodiment illustrated, the

a m a mployed consists of a trip device stru'ction and arrangement ofthe parts Will tion to follow 11 pre-i arranged directly beneath-thepump spring lever and The exact conaction and -to;- release it" be bestunderstood from the detaileddescrip-e In the accompanying drawings, theinvene tion has been shown merely in preferred form and. by way ofexample, but obviously many changes and variations may be made. there nand in its Vmodej of application,. which will therefore be understoodthat the invention 'ment, except 'n so vfar as specified in tlie claims.4 g Referring tothe drawings 1 is arver'tical section takenjthi uequipped with the present improvements Figs. 2,

lan view ofFig. AL ,and v Fig; 6 is a detailfperspectiveview',showingstill be comprised within itsspirit; ns o' di r not limited to any.specific form or embod such limitations are chanismr of a linotype'machine 3 and tare similar views, showing the parts-1n differentrelative positions l 7 Fig. 5is a top "the improved trip device on anfenla'rg'edscale.

' In Fig. 1,'the parts are shownirrt'herela- J 'tive position theyoccupy *after "a composed been justified and lire of matrices has justprior to the commencement of the; casting operation, the slotte'd mold Abeing closed V thereto by -a so-ca'lled B, and

pot C is formed with a'throatl or passage C I closed-at the rear by 'Jof a melting:potGif'Tliej atthe front by the matrix line, whicli is pre-'sented momentarily fi r'i-J elevator aid '1 i the mouth-piece O G.during the time the horizontal member H operation. The plunger D isconnected by means of a rod or link D to the front or free end of afore-and-aft rocking lever E, which latter is formed at its opposite endwith an elongated bearing sleeve E loosely mounted on a transverse rockshaftF. This shaft F is j ournaled in a fixed supporting bracket F andis provided with two arms E E the former carrying an anti-friction steelroller 6 arranged to track upon the periphery of a rotary cam Gfast tothe main shaft G and the latter being extended laterally beneath an-.other fore-and-aft lever E keyed or otherwise secured to the rock shaftF. I At the front, the lever E is connected to a long pull spring Ewhich is powerful enough to depress the plunger D and force a charge ofmetal under high pressure into the mold. Withthis known arrangement,thecam G, being formed with the usual recess G in its periphery, and byreason of its engagement with the roller 6, is capable of controllingthe operation of the plunger thru the lever E; and the spring E thru theengagement of the lever E with the arm E is capable of depressing theplunger to carry out the slugcasting operation, the latter operationbeing permitted when the recess G is brought opposite the roller 6. Itwill now be seen that, except at the moment of casting, the cam Gsustains the pump plunger thruout each machine cycle of operation in itsraised or inactive position against the tension of the spring E andsince the recess G takes up but a comparatively short section of the camtrack, the major portion thereof is constantly subjected to the wear andgrind of the pump lever roller 6 under the heavy pressure of the pumpspring.

In order to remedy this condition and overcome the difficulties arisingtherefrom, the present invention provides automatic means for relievingthe pump lever of the tension of its actuating spring until just priorto the casting period, so as thus to remove the pres sure of the pumplever roller upon the cam pump plunger is inactive. Such means (as bestshown'in Fig. 6) comprises an angular trip dog H, which in the presentinstance is arranged beneath and in operative relation to thespring-actuated lever E The dog H is centrally pivoted in a fixedsupporting bracket J and presents a and an upright member H the latterin the normal position of the dog being adapted to sustain the lever Eagainst the tension of the spring E and when the dog is rocked about itspivotal axis to move out of the path of said lever to permit itSoperation. The-rocking of the trip dog H is efi'ected thru itshorizontal member H by means of a bell crank lever K'pivotal'lyconnected to a rearwardly projecting portion J of the bracket J andarranged to operate in a plane disposed at right angles to the trip do6ne arm K of the lever K extends forwardly and terminates directlybeneath the free end of the horizontal member H of the dog H, where itis confined and restrained against vertical displacement by a lug Jformed on the bracket J. This lug is in no way essential to theoperationof the device, but it insures a predetermined position'of 'the'lever K,which is important for reasons .lever K at the proper time. When thelever K is thus actuated, its forwardly projecting arm K is forcedupwardly and rocks the trip dog H so as to locate the upright member Hclear of the spring lever E the return movement of the dog as well asthat of the lever K being effected, after the shoe L passes the finger72, by a light pull spring H anchored to the frame work and connected,to the free end of the horizontal member H To facilitate the rockingmovements of the trip dog H, the spring-actuated lever ET is raised atthe time out of contact with the upright member H this beingaccomplished by making the customary anti-wear shoe G (employed to formand define the leading end of the recess G slightly higher than here-"'tofore and by adding at the following end of said recess a secondanti-wear shoe G of corresponding height. 'Accordingly, immediatelybefore and after the descent of the plunger D (shown respectively inFigs. 1 and 3), the roller 6 will be in contact with first one and thenthe other of these shoes and, thru the pump lever arm E will support thelever E momentarily clear of the dog H, thus permitting the latter to berocked out of the path of the lever E while the roller is in contactwith the first shoe G and later returned to its original positionbeneath said lever when theroller is engaged by the second shoe G It isfrequently necessary in practice to back up the machine, that is, toturn the cam shaft G by hand in the reverse direction to that in whichit normally rotates, and if onsuch occasions the finger It should beengaged by the cam shoe L ,'it would merely be raised about its pivotalaxis without disturbing the bell crank lever K. The parts are in thisway insured against possible breakage which might otherwise occur whilethe inc The operation of the parts is, as follows;

In Fig. 4, the machine isshown at rest with v 1 the lever E supportedagainst the tension of the spring E by the trip dog H and the pump leverroller a sustained clear of the cam G by the buoyancy of themolten metalin the pot thru the pump lever E and the intervening connections. Thisrelation ofthe parts remains unchanged until the shoeGr, by rotation ofthe cam shaft G is brought into contact with the roller 6 (see Fig. 1).By such contact, the rock shaft F is turned a few degrees in a clockwisedirection and raises the lever E out of contact with the L on the cam'Lengages the finger k on the depending arm K of the bell crank lever Kand, as the cam" shaft continues to rotate, pushes the arm K forwardly.The other arm K of the lever K is thus swung upwards 1y against thetension of the spring H I and rocks the uprightmember of the trip dogout of the path of the lever E (Fig.2). The latter is now free, andimmediately the recess G is brought opposite the'roller e, the spring Eacts thru said lever to depress the pump plunger D in the manner beforedescribed. As the cycle of operation progresses, the pump lever E, aswell as the spring-actuated lever B are rocked upwardly by the cam trackof the recess G and the roller 6 is then .engaged by the shoe G(seeFig'. 3), whereupon the lever E thru the lateral arm E of the leverE, is again lifted slightly further to clear the trip dog H and allowthe spring H to return the dog to its original active or lookingposition beneath thelever E -When the shoe Gr passesbeyond the roller 0,the

lever Etwill come to rest upon the upright member H of the, dog H andthereby relieve the pump lever E, and hence the cam G, of the pressurefrom the spring E The pump cam G, as herein shown, is'substantially thesame in form as the one now used in the standard li'notype machines, but

with the present improvements, it will be obvious that it could be madein the form only suflicient area to embody the recess G v or the otherof the camsimme'diately adjacent. In such. case, however, the pumpleverE and the spring lever E should preferably be connected in apositive manner so that p the former will be sup-ported by the latter intheir raised or inactive positions.

Having thus describedmy invention, what I claim is: I 1. In atypographical casting machine,the

combination of a metal pot, a plunger ar-" ranged to reciprocatetherein, a spring or equivalent means for actuating the plunger, andautomatic means for locking the spring for actuating said-lever. 1 a r l"ZzjIna typographical casting machine, the

normally out of action and for releasing. it

equivalent meansfor actuating the plunger, a'canl shaft, a rotatable cammounted thereon for'controlling the operation'of the-plunger,

and means controlled from said shaft for 1 locking the spring normallyout of action and 1 forreleasing it momentarily during each rotationof'the cam."-. I 3. In a typographicalcasting machine, the

"combination of 'a metal pot, apump plunger V p. 7 therein,anoperatinglever therefor, a'spr'ing trip dog H. At or about th1s time,the shoe orjequivalent means cormected to the lever for-actuating" theplunger, a rotatable cam for controlling the operation of -said'lever, Iand autolnatic ineansfor locking the spring t5 normally outof actionand'for-releasing it momentarily during each rotation of the cam. l. Ina typographicalcasting-machine, the combination of" a 'metal pot," aplunger ary ranged to reciprocate therein,- a springor' o equivalentmeans for actuating the plunger, a

cam for controlling the operatiolr-of the plunger,a trip dog movableinto and outsof ranged toreciprocate therein, a' springcon- 9 tro'lledlever for; actuating the plunger, a

caIn -for controlling the operation of the 'plungerthru said 1eve'r,-atripdog-movable into and out of operative position for looking'said'levernornially out of action, autoimatic 'means for operating thetrip dog, and

Y means cooperating therewith for providing --clea ranc ebetweenthelever and the trip dog toi 'facilit'ate operation of the latter. p g 16.In a typographical casting machine, the -1 {combination 'of a metal pot,a plungerj-arranged to reciprocate therein, a'spring or equivalent meansfor actuating the plunger,

of a segm nt or segmental Section having I rotatablereamforvcontrolhnethe. p w

ofthe'plunger,'a trip dog movable into and f s and might therefore becast integral with one of Operative 'posrmon for lockmg spring normallyout of action, a,leverff or mounted adjacent theplunger control cam,

combinationof'a metal pot, a "'plunger ar-.

ranged? to reciprocate therein, a spring-cone .trolled leverfora'ctuatingthe plunger, a rotatablecain for controlling the" operation'1 25 Y ofthe plunger thrusaid lever, a trip dog movable into and'out ofoperative position for locking said lever normally out of action, andautomatic means for operating the trip I dog, said plunger control cambeing provided with a pair of shoes or. lugs arranged to cooperate withsaid means and adapted during each rotation of the cam'to raise theplunger actuating lever clear of the trip dog to facilitate itsoperation.

8. In a typographical casting machine, the combination of a metal pot, aplunger arranged to reciprocate therein, a spring-actuated andcam-controlled lever for operating the plunger, and automatic meansserving normally to relieve the cam of spring pres sure but operative ateach cycle of operation of the machine to release the spring for thecasting operation. 9. In a typographical casting machine, thecombination of a metal pot, a plunger ar-' ranged to reciprocatetherein,a spring or equivalent means for actuating the plunger to effectcasting, an automatic trip device :ggjadapted normally to lock thespring out of act-ion, and means actuated at each cycle of the operationof the machine for releasing the spring for the casting operation.

-10. In a typographical casting machine,

the combination of a metal pot, a plunger arranged to reciprocatetherein, a spring for actuating the plunger, a rotary cam to control theoperation of the plunger against the tension of its actuating spring, atrip dog for looking the spring norm-ally out of action, a lever foroperating the trip dog, a rotary cam for actuating said lever, andintermediate means whereby the latter cam is allowed to actuate saidlever only while turning in one 7 1 direction.

11. In a typographical casting machine, .the combination of a metal pot,a plunger arranged to reciprocate therein, a spring for actuating theplunger, a rotary cam to control 401 the operation of the plungeragainst the tension of its actuating spring, a trip dog for locking thespring normally out of action, a lever for operating the trip dog, arotary cam for actuating said lever, and a pivoted finger Q carried bythelever and arranged to engage the second cam whereby the latter-isallowed to actuate the lever only while turning in one direction. p c12. In a typographical casting machlne,

. the combination of a metal pot, a plunger arranged to reciprocatetherein, a spring for actuating the plunger, a rotary cam to control theoperation of the plunger against the ten- .sion of its actuating spring,a trip dog for looking the spring normally out of action,

and means actuated at each cycle of operation of the machine foroperating the trip dog to release the spring for the casting operation.In testimony whereof, this specification has been duly signed by: JOHNR, ROGERS.

